Add split-loop-with-lambda learning hour: draft, pre-factored exercise, solution

- Samman learning hour: 5/5/10/25/5 outline; pairs stop at extracted
  method taking the lambda as a parameter
- exercise/java: pre-factored variant of the kata (Q1/Q4 dead branch
  stripped, dates as constant), approval test red/flaky by design
- exercise/solution: collectExpectedWeather(LongFunction<Boolean>) +
  no-arg overload; deterministic approval test (all-sunny lambda)
- rehearse-with-agent.md: rehearsal setup with qwen + java-refactoring-mcp

ideas/split-loop-with-lambda/exercise/solution/pom.xml

@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>codingdojo</groupId>
+    <artifactId>icecream-split-loop-lambda-exercise</artifactId>
+    <version>1.0.0</version>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>5.10.2</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.approvaltests</groupId>
+            <artifactId>approvaltests</artifactId>
+            <version>18.6.0</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>